<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
  <script>
      var sum = 0;
      for(var i = 1;i <= 9;i ++){
          for(var j = 0;j <= 9;j ++){
              if(i ^ j){
                  sum =(i * 1000) + (i * 100) + (j * 10) + j;
                  for(var n = 30;n < 100;n ++){
                      if(n == Math.sqrt(sum)){
                          document.write("肇事车辆1车牌号为："+ sum);
                      }
                  }
              }
          }
      }
  </script>
</body>
</html>